Wavelength division coupler and optical transceiver using the same
AssigneeSamsung Electronics Co., Ltd.
InventorsJeong-Hwan Song, Yun-Kyung Oh
Life of this patent
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Abstract
A wavelength division coupler capable of dividing and coupling at least three wavelengths is provided. The wavelength division coupler includes a first waveguide having a first end and a second end, a second waveguide having a third end and a fourth end, in which a section between the third end and the fourth end is located adjacently to one end of the first waveguide to form a mode coupling section for dividing or coupling an input light, and a Bragg zone having a Bragg grating in the mode coupling section formed in portions of die first waveguide and the second waveguide.
Claims14
A wavelength division coupler comprising:
- a first waveguide having a first end and a second end;
- a second waveguide having a third end and a fourth end, in which a section between the third end and the fourth end is located adjacent to one end of the first waveguide to form a mode coupling section;
- a Bragg zone having a Bragg grating formed in portions of the first waveguide and the second waveguide of the mode coupling section,
- wherein, the mode coupling section further includes a non-grated zone in which the Bragg grating is not provided and the length of the non-grated zone is determined as follows:
- tan
-
- (
- 2
-
-
- k
- ab
-
-
- L
- l
- opt
- )
- =
- s
-
- k
- ab
-
-
- tanh
-
- (
- sL
- 2
- )
- ,
- where L1 indicates the length of the non-grated zone and s indicates the square root of a difference between |k| and |kab|.
A method of providing a wavelength division coupler comprising:
- providing a first waveguide having a first end and a second end;
- providing a second waveguide having a third end and a fourth end near the first waveguide to form a mode coupling section therebetween;
- and
- forming a Bragg grating formed in the first waveguide and the second waveguide of the mode coupling section,
- wherein mode coupling section is further formed to include a non-grated zone in which the Bragg grating is not provided and the length of the non-grated zone is determined as follows:
- tan
-
- (
- 2
-
-
- k
- ab
-
-
- L
- l
- opt
- )
- =
- s
-
- k
- ab
-
-
- tanh
-
- (
- sL
- 2
- )
- ,
- where L1 indicates the length of the non-grated zone and s indicates the square root of a difference between |k| and |kab|.
Dependencies are inferred from the claim text.